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Finding the Fourth Proportional to 111,662.47, 154,103.66 and 61,371.91

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Solution

The fourth proportional to 111,662.47, 154,103.66 and 61,371.91 is: 84,698.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,662.47 : 154,103.66 = 61,371.91 : x
  2. Step 2: Convert to fraction form
    111,662.47/154,103.66 = 61,371.91/x
  3. Step 3: Cross multiply
    111,662.47x = 154,103.66 × 61,371.91
  4. Step 4: Simplify right side
    111,662.47x = 9,457,635,952.19
  5. Step 5: Solve for x
    x = 9,457,635,952.19/111,662.47
  6. Step 6: Final answer
    x = 84,698.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.